The Dynamics of Laser Surface Modification
Journal of Manufacturing Processes
MetadataShow full item record
Earl, C., Castrejón-Pita, J., Hilton, P., & O'Neil, W. (2015). The Dynamics of Laser Surface Modification. Journal of Manufacturing Processes, 21 214-223. https://doi.org/10.1016/j.jmapro.2015.10.002
The mechanisms involved in the production of surface features of protruding material formed by the interaction of a laser beam and a metallic substrate are investigated aiming to optimise the process efficiency. A relationship between laser induced surface features and filament breakup theory has been established. Results indicate that for the production of features the geometry of the protrusion with a filament critical aspect ratio over 6.0±1.0 is required. In addition results show the surface tension, viscosity and density of the molten material, and the dynamics of the process dictate the characteristics of the forming feature. Using filament breakup and spatter production equations surface feature processing parameters can be predicted as demonstrated by the three metallic materials used in this study: Aluminium 5000 series, Stainless steel 304 and Ti-6Al-4V, all of which show consistent results.
This work is funded by the Engineering and Physical Sciences Research Council (EPSRC) CASE award number NMZM/162 RG61816 and TWI Ltd. The authors would like to thank the EPSRC Engineering Instrument Loan Pool and Peter Anthony for the loan of the high speed imaging camera and illumination system. Also, thanks to Wen-Kai Hsiao for the loan of the imaging lens. JRCP acknowledges the support from the EPSRC (project number EP/H018913/).
CRANFIELD UNIVERSITY (FB EPSRC) (EP/I033491/1)
External DOI: https://doi.org/10.1016/j.jmapro.2015.10.002
This record's URL: https://www.repository.cam.ac.uk/handle/1810/252383